US4111323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crown closure
Assignee: Nippon Closures Co Ltd
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Filing: 1977-03-04
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Granted: 1978-09-05
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Expires: 1997-03-04
Abstract
Abstract A crown closure having a polyolefin liner that can be readily removed, said crown closure comprising a crown shell having a primer layer on its inner surface and a polyolefin liner applied to the inside of said crown shell, characterized in that said primer layer is a two-component priming consisting of an undercoat layer containing a polyethylene oxide and a topcoat layer containing a polyethylene oxide and at least one other compatible resin, with the provision of a printing layer of indicia at the interface between said undercoat and topcoat layers or atop said topcoat layer. Aforesaid crown closure can be prepared by providing at one face of a metal stock sheet a primer undercoat layer containing a polyethylene oxide, printing indicia thereon, providing atop said undercoat layer a primer topcoat layer containing a polyethylene oxide and at least one other compatible resin, and thereafter forming said metal stock sheet into crown shells in such a manner that said coating layers come to the inside of the shells followed by depositing a polyolefin mass in said shells and molding same into the form of liners.
Inventors
- 👤 Isao Ichinose
- 👤 Mitsuhiro Sakemoto
- 👤 Noboru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
B; B65; B65D; B65D53/00; B65D53/04; B65D41/00; B65D41/02; B65D41/10; B65D41/12; B65D51/00; B65D51/24; B65D51/245; G; G09; G09F; G09F23/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486; Y10T428/24868; Y10T428/24876; Y10T428/24917; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
A crown closure having a removable polyolefin liner, said crown closure comprising a crown shell having a primer layer on its inner surface and the polyolefin liner applied to the inside of said crown shell, characterized in that said primer layer is a two-component priming consisting of an under coat layer containing a polyethylene oxide and a top coat layer containing a polyethylene oxide and at least one other compatible resin, with the provision of a printing layer of indicia at the interface between said under coat and top coat layers or atop said top coat layer.
Claim 2
Dependent Claim
97 words
A crown closure having a removable polyolefin liner, said crown closure comprising a crown shell having a primer layer on its inner surface and the polyolefin liner applied to the inside of said crown shell, characterized in that said primer layer is a two-component priming consisting of an under coat layer containing a polyethylene oxide and a top coat layer containing a polyethylene oxide and at least one other compatible resin, with the provision of a printing layer of indicia at the interface between said under coat and top coat layers or atop said top coat layer.
Claim 3
Dependent Claim
14 words
A crown closure of claim 1 wherein said polyolefin liner is a polyethylene liner.
Claim 4
Dependent Claim
16 words
A crown closure of claim 1 wherein the oxygen content of said polyethylene oxide is 0.1-10%.
Claim 5
Dependent Claim
17 words
A crown closure of claim 1 wherein said polyethylene oxide has an average molecular weight of 1000-50,000.
Claim 6
Dependent Claim
21 words
A crown closure of claim 1 wherein said under coat layer contains a polyethylene oxide and at least one other resin.
Claim 7
Dependent Claim
14 words
A crown closure of claim 5 wherein said other resin is a thermosetting resin.
Claim 8
Dependent Claim
34 words
A crown closure of claim 1 wherein said top coat layer contains, based on said top coat layer, 1-50% by weight of the polyethylene oxide and 50-99% by weight of said resin component compatible.
Claim 9
Dependent Claim
18 words
A crown closure of claim 1 wherein said indicia are printed using ink used for printing on metals.
Claim 10
Dependent Claim
106 words
A process for manufacturing a removable crown closure having a polyolefin liner that can be readily removed, said process comprising providing at one face of a metal stock sheet a primer under coat layer containing a polyethylene oxide, printing indicia thereon, providing atop said under coat layer a primer top coat layer containing a polyethylene oxide and at least one other compatible resin, and thereafter forming said metal stock sheet into crown shells in such a manner that said coating layers come to the inside of the shells, followed by depositing a polyolefin mass in said shells and molding said mass into the form of liners.
Claim 11
Dependent Claim
106 words
A process for manufacturing a removable crown closure having a polyolefin liner that can be readily removed, said process comprising providing at one face of a metal stock sheet a primer under coat layer containing a polyethylene oxide, printing indicia thereon, providing atop said under coat layer a primer top coat layer containing a polyethylene oxide and at least one other compatible resin, and thereafter forming said metal stock sheet into crown shells in such a manner that said coating layers come to the inside of the shells, followed by depositing a polyolefin mass in said shells and molding said mass into the form of liners.
Claim 12
Dependent Claim
104 words
A process for manufacturing a crown closure having a removable polyolefin liner said process comprising providing at one face of a metal stock sheet a primer under coat layer containing a polyethylene oxide, providing atop said under coat layer a top coat layer containing a polyethylene oxide and at least one other compatible resin, printing indicia on said top coat layer, and thereafter forming said metal stock sheet into crown shells in such a manner that said coating layers come to the inside of the shells, followed by depositing a polyolefin mass in said shells and molding said mass into the form of liners.
Claim 13
Dependent Claim
104 words
A process for manufacturing a crown closure having a removable polyolefin liner said process comprising providing at one face of a metal stock sheet a primer under coat layer containing a polyethylene oxide, providing atop said under coat layer a top coat layer containing a polyethylene oxide and at least one other compatible resin, printing indicia on said top coat layer, and thereafter forming said metal stock sheet into crown shells in such a manner that said coating layers come to the inside of the shells, followed by depositing a polyolefin mass in said shells and molding said mass into the form of liners.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |